They were five short of Sussex's 67 against Hampshire in 2004 when Deon Kruis joined Adil Rashid and put on 23 to spare their team any further embarrassment.
But first-innings centurion Blackwell snuffed out any remaining danger with the help of Peter Trego, the pair adding 70 together before Trego hit Rashid to Deon Kruis at mid-off.
Had they found a way past the obdurate defence of Matthew Hoggard or Deon Kruis, they would have moved top of Division One of the County Championship with three matches remaining.
However, three wickets in four balls from Deon Kruis left the innings in tatters, and when spin prodigy Adil Rashid took the sixth wicket it ensured Yorkshire would not be relegated if they win the match.